HYDROXYNAPHTHOL BLUE Chemical Properties

storage temp. 

Store at +15°C to +30°C.

solubility 

340g/l

form 

Solid

color 

Dark Gray

PH

2-3 (10g/l, H2O, 20℃)

Stability:

Stable. Incompatible with strong oxidizing agents.

CAS DataBase Reference

63451-35-4(CAS DataBase Reference)

EPA Substance Registry System

2,7-Naphthalenedisulfonic acid, 3-hydroxy-4-[(2-hydroxy-4-sulfo-1-naphthalenyl)azo]-, trisodium salt (63451-35-4)

Safety Information

Hazard Codes 

Xi

Risk Statements 

36/37/38

Safety Statements 

26-36

WGK Germany 

WGK 3 highly water endangering

HS Code 

2927 00 00

HYDROXYNAPHTHOL BLUE Usage And Synthesis

Chemical Properties

blue crystalline powder

Uses

Hydroxynapthol Blue is a pharmaceutical dye used in colorimetric analyses.

Purification Methods

The crude material is treated with hot EtOH to remove soluble impurities, then dissolve in 20% aqueous MeOH and chromatographed on a cellulose powder column with propanol/EtOH/water (5:5:4) as eluent. The upper of three zones was eluted to give the pure dye which is precipitated as the monosodium salt trihydrate by adding conc HCl to the concentrated eluate [Ito & Ueno Analyst 95 583 1970]. It can be converted to the trisodium salt wih the calculated amount of alkali. Indigocarmine (2[1,3-dihydro-3-oxo-5-sulfo-2H -indol-2-ylidene]-2,3-dihydro-3-oxo-1H -

HYDROXYNAPHTHOL BLUE(63451-35-4)Related Product Information

• HYDROXY NAPHTHOL BLUE
• Acid Orange 7
• CROCEIN ORANGE G
• Naphthionic acid
• 2,2'-DIHYDROXYAZOBENZENE
• Acid Red 27
• 3-Hydroxynaphthalene-2,7-disulphonic acid
• Sodium 1-amine-2-naphthol-4-sulfonate
• Sodium 4-amino-1-naphthalenesulfonate
• Mordant Black 17
• Sudan I
• Sodium 6-hydroxynaphthalene-2-sulfonate
• 1-Amino-2-naphthol-4-sulfonic acid
• 1-Aminonaphthalene-6-sulfonic acid
• Disodium 2-naphthol-3,6-disulfonate
• ACID RED 88
• HYDROXYNAPHTHOL BLUE
• Food Yellow 3:1